T-Embed CC1101 Plus for Beginners

Hi! I am new to this field. Always wanted to get a Flipper Zero to experiment with and learn concepts and cybersecurity, but it is expensive as a beginner for me (or as a hobby to test). I came across the T-Embed CC1101 Plus, and it does most of it much cheaper!

I am an engineer and don't mind coding and experimenting. Is this a good starting point? Or after a short period of time, it is mostly useless, or does it have room to add features along the way?

Also, if I get the External antenna version, it means it won't work without them (as a compact pocketable mode)?

And lastly, can I run it plugged in to avoid battery drain?! Thanks!